Type definitions

[plungingChode]

I'd like to add type definitions for the library to DefinitelyTyped, but unfortunaltely the active global property is preventing that:

stretchy/src/stretchy.js

Line 135 in 68bc059

export let active = true;

Since in TypeScript type definition files all exported variables are treated as read-only, and cannot be reassigned. Would it be possbile to convert this to a function? For example:

let active = true;

function setActive(isActive) {
    active = isActive;
}

This way the library could be (more easily) usable in TypeScript projects. You can see my current type definition implementation here.